SUBSIM Radio Room Forums



SUBSIM: The Web's #1 resource for all submarine & naval simulations since 1997

Go Back   SUBSIM Radio Room Forums > Silent Hunter 3 - 4 - 5 > Silent Hunter III
Forget password? Reset here

Reply
 
Thread Tools Display Modes
Old 04-17-18, 08:01 AM   #1
PaleBlueDot
Watch
 
Join Date: Feb 2014
Location: Leuven, Belgium
Posts: 17
Downloads: 58
Uploads: 0
SHO I keep missing torpedoes?

Hello all.

I'm using GWX and MaGui's GUI mod.

I've been practicing different techniques in the "torpedo" training session of naval academy, trying to shoot down the medium tanker. For some reason though, I keep hitting either his bow or I miss him a bit in front of his bow. Even though my solution is set to hit him at the superstructure.

I'm using a U-jagd chronometer to determine his speed, sometimes with a chekup on the map (find the distance travelled in one minute). I'm not yet good at determining the AOB by just looking at the ship, so I usually make a guess, but end up just measuring it on the map. Distance doesn't really play a big role in the solution but I use the stadimeter.

Any suggestions or tips?
PaleBlueDot is offline   Reply With Quote
Old 04-17-18, 08:12 AM   #2
hauangua
Grey Wolf
 
Join Date: Jul 2011
Location: Verona, Italy
Posts: 909
Downloads: 1328
Uploads: 0
Default

Quote:
Originally Posted by PaleBlueDot View Post
Hello all.

I'm using GWX and MaGui's GUI mod.

I've been practicing different techniques in the "torpedo" training session of naval academy, trying to shoot down the medium tanker. For some reason though, I keep hitting either his bow or I miss him a bit in front of his bow. Even though my solution is set to hit him at the superstructure.

I'm using a U-jagd chronometer to determine his speed, sometimes with a chekup on the map (find the distance travelled in one minute). I'm not yet good at determining the AOB by just looking at the ship, so I usually make a guess, but end up just measuring it on the map. Distance doesn't really play a big role in the solution but I use the stadimeter.

Any suggestions or tips?
For take speed in navigation map you need wait 3 minutes and 15 second,
and measure the distance that the target has traveled
__________________
Parked under the balcony with my U-27 waiting Juliet finish makeup
hauangua is offline   Reply With Quote
Old 04-17-18, 12:50 PM   #3
PaleBlueDot
Watch
 
Join Date: Feb 2014
Location: Leuven, Belgium
Posts: 17
Downloads: 58
Uploads: 0
Default

Quote:
Originally Posted by hauangua View Post
For take speed in navigation map you need wait 3 minutes and 15 second,
and measure the distance that the target has traveled
It doesn't need to be 3 minutes and 15 seconds necessarily. Any distance and time will suffice if you want to do it on the map. Usually *if* I do it on the map, I take 5 minutes and look it up on the knots-minutes table.

What I want to know is

1) Does it matter what power of persicope (x1.5 , x6 or x12) I use for the U-jagd?

2) What is the error on the speed measured by the U-jagd when the ship is at a big angle (say, AOB = 35°)?

And 3) My original question -- why are my torpedoes missing even though my maths seem to be correct?

I'm a physics student with a minor in mathematics -- my math is usually correct with respect to these things. So I guess it's gotta be an error in torpedo parallax or another measurment error?

I'm tempted to step away from the parallax hypothesis because I tend to keep my gyro-angles under 10°, which should reduce the parallax effect, yet I keep missing or barely hitting the bow.
PaleBlueDot is offline   Reply With Quote
Old 04-17-18, 06:05 PM   #4
bstanko6
Admiral
 
Join Date: Feb 2015
Location: Murwik Naval Academy
Posts: 2,122
Downloads: 390
Uploads: 13


Default

Are you selecting the correct AOB? Port or starboard? It has to be right!
bstanko6 is offline   Reply With Quote
Old 04-17-18, 06:09 PM   #5
schlechter pfennig
Commander
 
Join Date: Mar 2010
Posts: 457
Downloads: 52
Uploads: 7
Default

Are you also opening the tube doors prior to firing?
schlechter pfennig is offline   Reply With Quote
Old 04-18-18, 07:11 AM   #6
Pisces
Silent Hunter
 
Join Date: Dec 2004
Location: AN9771
Posts: 4,892
Downloads: 300
Uploads: 0
Default

Quote:
Originally Posted by PaleBlueDot View Post
...
What I want to know is

1) Does it matter what power of persicope (x1.5 , x6 or x12) I use for the U-jagd?
No, for the speed measurement only the centerline is important. If you are measuring range and AOB then yes. As the apparent size changes with zoom level.

Quote:
2) What is the error on the speed measured by the U-jagd when the ship is at a big angle (say, AOB = 35°)?
AOB (angle between target bow and centerline of periscope) doesn't matter. But you can't see the exact tip of the bow and stern when the angle of the bow is near 0 or 180. When you are looking at it's broad side then your timing accuracy is the best.

Quote:
And 3) My original question -- why are my torpedoes missing even though my maths seem to be correct?

I'm a physics student with a minor in mathematics -- my math is usually correct with respect to these things. So I guess it's gotta be an error in torpedo parallax or another measurment error?

I'm tempted to step away from the parallax hypothesis because I tend to keep my gyro-angles under 10°, which should reduce the parallax effect, yet I keep missing or barely hitting the bow.
Are you moving forward when you are doing the U-jagd speed measurement? And are you looking sideways? (bearing not 0 or 180) Then you own speed infuences the measurement. It drags the imaginary fixed wall through the sea sideways. So the other ship has longer or shorter time to pass through it resulting in an incorrect speed. If the periscope is straight ahead or straight aft then your speed does not influence. So best is to come to a true full stop, or turn the bow to face the target ahead of it's path.
Pisces is offline   Reply With Quote
Old 04-18-18, 11:32 PM   #7
allievo
Stowaway
 
Posts: n/a
Downloads:
Uploads:
Default

Make sure your U-boat isn't turning when you launch a torpedo. Your rudder should always be set to 0 degree before firing. Also keep in mind targets tend to alter speed and course as soon as they detect your U-boat or your torpedoes which might cause them to hit the target at an unexpected spot.
  Reply With Quote
Old 04-20-18, 11:42 AM   #8
GoldenRivet
Subsim Aviator
 
GoldenRivet's Avatar
 
Join Date: Mar 2007
Location: Texas
Posts: 8,710
Downloads: 146
Uploads: 0


Default

easiest way to determine AOB

__________________
GoldenRivet is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 01:58 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright © 1995- 2024 Subsim®
"Subsim" is a registered trademark, all rights reserved.